In the anime Fullmetal Alchemist: Brotherhood, there is an episode early on in which a little girl and her pet dog are "transmuted" into a single creature, which looks somewhat like the dog in the OC. It is an incredibly sad episode, and the gif that was posted as a comment is the main character in despair at the little girl's situation.

you're allowed to feel, but if I find you convulsing and crying about it on some thread somewhere like every other autistic teen that watches it I swear I will look for you, I will find you and I will kill you